// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_INTERPRETER_BYTECODE_DECODER_H_
#define V8_INTERPRETER_BYTECODE_DECODER_H_

#include <iosfwd>

#include "src/globals.h"
#include "src/interpreter/bytecode-register.h"
#include "src/interpreter/bytecodes.h"

namespace v8 {
namespace internal {
    namespace interpreter {

        class V8_EXPORT_PRIVATE BytecodeDecoder final {
        public:
            // Decodes a register operand in a byte array.
            static Register DecodeRegisterOperand(Address operand_start,
                OperandType operand_type,
                OperandScale operand_scale);

            // Decodes a register list operand in a byte array.
            static RegisterList DecodeRegisterListOperand(Address operand_start,
                uint32_t count,
                OperandType operand_type,
                OperandScale operand_scale);

            // Decodes a signed operand in a byte array.
            static int32_t DecodeSignedOperand(Address operand_start,
                OperandType operand_type,
                OperandScale operand_scale);

            // Decodes an unsigned operand in a byte array.
            static uint32_t DecodeUnsignedOperand(Address operand_start,
                OperandType operand_type,
                OperandScale operand_scale);

            // Decode a single bytecode and operands to |os|.
            static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
                int number_of_parameters);
        };

    } // namespace interpreter
} // namespace internal
} // namespace v8

#endif // V8_INTERPRETER_BYTECODE_DECODER_H_
